@mixin whb($w:420px,$h:360px,$b:transparent){
    width: $w;
    height: $h;
    background: $b;
}

div{
    @include whb(400px,340px,rgb(183, 218, 58));
}
$br:50%;
h1{
    @include whb(360px,200px,cyan);
    border-radius: $br;
}

span{
    @include whb(300px,300px,#213547);
    display: inline-block;
}

p{
    @include whb($h:100px,$b:orange,$w:200px);
}